Loading of bosons in optical lattices into the p band

Abstract

We present a method for transferring bosonic atoms residing on the lowest s-band of an optical lattice to the first excited p-bands. Our idea hinges on resonant tunneling between adjacent sites of accelerated lattices. The acceleration effectively shifts the quasi-bound energies on each site such that the system can be cast into a Wannier-Stark ladder problem. By adjusting the acceleration constant, a situation of resonant tunneling between the s- and p-bands is achievable. Within a mean-field model, considering 87Rb atoms, we demonstrate population transfer from the s- to the p-bands with around 95 % efficiency. Nonlinear effects deriving from atom-atom interactions, as well as coupling of the quasi bound Wannier-Stark states to the continuum, are considered.

8 pages, 7 figures

References in corpus (10)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
• Quantum Simulation of Antiferromagnetic Spin Chains in an Optical Lattice
• Orbital superfluidity in the $P$-band of a bipartite optical square lattice
• The $p_{x,y}$-orbital counterpart of graphene: cold atoms in the honeycomb optical lattice
• State preparation and dynamics of ultracold atoms in higher lattice orbitals
• Unconventional superfluid order in the $F$-band of a bipartite optical square lattice
• Quantum Antiferromagnetism of Fermions in Optical Lattices with Half-filled p-band
• Dynamical instability and loss of p-band bosons in optical lattices

Cited by in corpus (3)

• Physics of higher orbital bands in optical lattices: a review
• Assessing small accelerations using a bosonic Josephson junction
• Phase diagram of strongly attractive $p$-orbital fermions on optical lattices